I think so…
On W (192.168.0.212) default gateway is 192.168.0.1
but for network 192.168.1.0 gateway should be 192.168.0.86
Could you please try add routing on W (192.168.0.212)
for example
ip route add 192.168.1.0/24 via 192.168.0.86 dev eth0
and check access from 192.168.1.15 to W (192.168.0.212) again.
If I am wrong , someone please correct me.